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https://issues.apache.org/jira/browse/GROOVY-4063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16674555#comment-16674555
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Eric Milles commented on GROOVY-4063:
-------------------------------------
GROOVY-8472 seems related. Line number information in class file is the reason
the breakpoint does not hit. When compiling without "indy", there is a
fast-path conditional added and this generates two paths through the code and
both receive line number information for the visible source. This confuses the
debugger.
> Debugger Step Into doesn't work in Groovy-compiled classes when stepping
> filters are applied
> --------------------------------------------------------------------------------------------
>
> Key: GROOVY-4063
> URL: https://issues.apache.org/jira/browse/GROOVY-4063
> Project: Groovy
> Issue Type: Bug
> Components: class generator
> Affects Versions: 1.6.7, 1.7.0
> Reporter: Peter Gromov
> Priority: Major
> Attachments: debug-test.tar.gz
>
>
> Reproduced in IntelliJ IDEA 9, GroovyEclipse 2.0 and JSWAT 4.5, therefore the
> problem is probably in Groovy itself.
> Stepping class exclusion filters are set to ignore everything from Java and
> Groovy internals: groovy.*,org.codehaus.groovy.*,java.*,sun.*,org.apache.*
> {code}
> class Some {
> static void meth() {
> println "Method is called."
> }
> public static void main(String[] args) {
> meth() // breakpoint here
> }
> }
> {code}
> Run to the breakpoint in 'main' method. 'Step into'. There's a very long
> pause (presumably JVM applies the filters to all the underlying groovy
> internals), the message is printed and the program exits. Breakpoint is not
> hit.
> Now put the breakpoint to the 'println' line in 'meth' and repeat stepping
> into. This time the debugger stops at it.
> Stepping worked in earlier Groovy versions (e.g. 1.5) and stopped in 1.6.
> Therefore I suspect it to be somehow mystically related to class generation
> (or the libraries used, whatever)
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